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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/scheduler/vsync_time_source.h"
#include "base/logging.h"
namespace cc {
scoped_refptr<VSyncTimeSource> VSyncTimeSource::Create(
VSyncProvider* vsync_provider, NotificationDisableOption option) {
return make_scoped_refptr(new VSyncTimeSource(vsync_provider, option));
}
VSyncTimeSource::VSyncTimeSource(
VSyncProvider* vsync_provider, NotificationDisableOption option)
: active_(false),
notification_requested_(false),
vsync_provider_(vsync_provider),
client_(NULL),
disable_option_(option) {}
VSyncTimeSource::~VSyncTimeSource() {}
void VSyncTimeSource::SetClient(TimeSourceClient* client) {
client_ = client;
}
void VSyncTimeSource::SetActive(bool active) {
if (active_ == active)
return;
active_ = active;
if (active_ && !notification_requested_) {
notification_requested_ = true;
vsync_provider_->RequestVSyncNotification(this);
}
if (!active_ && disable_option_ == DISABLE_SYNCHRONOUSLY) {
notification_requested_ = false;
vsync_provider_->RequestVSyncNotification(NULL);
}
}
bool VSyncTimeSource::Active() const {
return active_;
}
base::TimeTicks VSyncTimeSource::LastTickTime() {
return last_tick_time_;
}
base::TimeTicks VSyncTimeSource::NextTickTime() {
return Active() ? last_tick_time_ + interval_ : base::TimeTicks();
}
void VSyncTimeSource::SetTimebaseAndInterval(base::TimeTicks,
base::TimeDelta interval) {
interval_ = interval;
}
void VSyncTimeSource::DidVSync(base::TimeTicks frame_time) {
last_tick_time_ = frame_time;
if (disable_option_ == DISABLE_SYNCHRONOUSLY) {
DCHECK(active_);
} else if (!active_) {
if (notification_requested_) {
notification_requested_ = false;
vsync_provider_->RequestVSyncNotification(NULL);
}
return;
}
if (client_)
client_->OnTimerTick();
}
} // namespace cc
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